class Program
{
static void Main(string[] args)
{
string[] lines = System.IO.File.ReadAllLines(@"d:\score.txt",Encoding.Default);
score.txt内容:
赵子龙|18|500
关羽|19|300
典韦|20|200
string maxName = "";//定义maxName记录成绩最高者姓名
int maxScore = -1;//定义maxScore记录最高者成绩
for (int i = 0; i < lines.Length; i++)
{
string line = lines[i];
string[] strs = line.Split('|');
Console.WriteLine("{0}", strs);
/*输出:
赵子龙
关羽
典韦
不用占位符(貌似是这么读)"{0}"时,输出:
System.String[]
System.String[]
System.String[]
难道是带了"{0}"就输出字符串,那数字不会当成字符串输出吗?求解!
*/
}
Console.ReadKey();
}
} static void Main(string[] args)
{
string lines = "赵子龙|18|500";
string[] str = lines.Split('|');
for (int i = 0; i < lines.Length; i++)
{
string line =[u] lines[i][/u];
string[] strs = lines.Split('|');
}
}
这段没读取文本,本身不是字符串类型吗?为什么提示无法将char类型转换成string?
{
static void Main(string[] args)
{
string[] lines = System.IO.File.ReadAllLines(@"d:\score.txt",Encoding.Default);
score.txt内容:
赵子龙|18|500
关羽|19|300
典韦|20|200
string maxName = "";//定义maxName记录成绩最高者姓名
int maxScore = -1;//定义maxScore记录最高者成绩
for (int i = 0; i < lines.Length; i++)
{
string line = lines[i];
string[] strs = line.Split('|');
Console.WriteLine("{0}", strs);
/*输出:
赵子龙
关羽
典韦
不用占位符(貌似是这么读)"{0}"时,输出:
System.String[]
System.String[]
System.String[]
难道是带了"{0}"就输出字符串,那数字不会当成字符串输出吗?求解!
*/
}
Console.ReadKey();
}
} static void Main(string[] args)
{
string lines = "赵子龙|18|500";
string[] str = lines.Split('|');
for (int i = 0; i < lines.Length; i++)
{
string line =[u] lines[i][/u];
string[] strs = lines.Split('|');
}
}
这段没读取文本,本身不是字符串类型吗?为什么提示无法将char类型转换成string?
但lines[i]是char类型
第二个的lines是string字符串,所以lines[i]是第i个字符,lines[i]是字符。
public static string Format(
string format,
Object[] args
)上面是MSDN上定义的Format语法,说明Object[] args是Oject类型,所以数字没问题
using System.Globalization;class Sample
{
enum Color {Yellow = 1, Blue, Green};
static DateTime thisDate = DateTime.Now; public static void Main()
{
// Store the output of the String.Format method in a string.
string s = ""; Console.Clear();// Format a negative integer or floating-point number in various ways.
Console.WriteLine("Standard Numeric Format Specifiers");
s = String.Format(CultureInfo.InvariantCulture,
"(C) Currency: . . . . . . . . {0:C}\n" +
"(D) Decimal:. . . . . . . . . {0:D}\n" +
"(E) Scientific: . . . . . . . {1:E}\n" +
"(F) Fixed point:. . . . . . . {1:F}\n" +
"(G) General:. . . . . . . . . {0:G}\n" +
" (default):. . . . . . . . {0} (default = 'G')\n" +
"(N) Number: . . . . . . . . . {0:N}\n" +
"(P) Percent:. . . . . . . . . {1:P}\n" +
"(R) Round-trip: . . . . . . . {1:R}\n" +
"(X) Hexadecimal:. . . . . . . {0:X}\n",
-123, -123.45f);
Console.WriteLine(s);// Format the current date in various ways.
Console.WriteLine("Standard DateTime Format Specifiers");
s = String.Format(CultureInfo.InvariantCulture.DateTimeFormat,
"(d) Short date: . . . . . . . {0:d}\n" +
"(D) Long date:. . . . . . . . {0:D}\n" +
"(t) Short time: . . . . . . . {0:t}\n" +
"(T) Long time:. . . . . . . . {0:T}\n" +
"(f) Full date/short time: . . {0:f}\n" +
"(F) Full date/long time:. . . {0:F}\n" +
"(g) General date/short time:. {0:g}\n" +
"(G) General date/long time: . {0:G}\n" +
" (default):. . . . . . . . {0} (default = 'G')\n" +
"(M) Month:. . . . . . . . . . {0:M}\n" +
"(R) RFC1123:. . . . . . . . . {0:R}\n" +
"(s) Sortable: . . . . . . . . {0:s}\n" +
"(u) Universal sortable: . . . {0:u} (invariant)\n" +
"(U) Universal sortable: . . . {0:U}\n" +
"(Y) Year: . . . . . . . . . . {0:Y}\n",
thisDate);
Console.WriteLine(s);// Format a Color enumeration value in various ways.
Console.WriteLine("Standard Enumeration Format Specifiers");
s = String.Format(CultureInfo.InvariantCulture,
"(G) General:. . . . . . . . . {0:G}\n" +
" (default):. . . . . . . . {0} (default = 'G')\n" +
"(F) Flags:. . . . . . . . . . {0:F} (flags or integer)\n" +
"(D) Decimal number: . . . . . {0:D}\n" +
"(X) Hexadecimal:. . . . . . . {0:X}\n",
Color.Green);
Console.WriteLine(s);
}
}
如果要达到目的,换成:Console.WriteLine("{0}", strs[0]);
中的strs是个System.String[]对象,所以结果肯定输出对象名。
如果要你想要的效果,改成
Console.WriteLine("{0}", strs[0]);